Ideal Diode Bridge

Ideal Diode Bridge
Output
9V to 72V
Input
DC to 600Hz
Active Diode Bridge Controller Minimizes
Voltage Drop & Heat Sinking Requirements
®
The workhorse of AC to DC rectification, the classic four-diode bridge, just got a makeover. The LT 4320 simulates an ideal
diode bridge by controlling four N-channel MOSFETs, significantly reducing heat dissipation and maximizing voltage to
the application. Heat sinks can be eliminated, reducing solution size and cost. More power is available to the end
application instead of being wasted as heat. Low voltage applications also benefit with the increased headroom provided by
the MOSFET bridge.
Features
Temperature Rise vs Load Current
•Low Loss Replacement for Diode
Bridge
•Maximizes Power Efficiency
•Eliminates Thermal Design Problems
•Maximizes Available Voltage
•9V to 72V Operating Voltage Range
•DC to 600Hz Operation
•IQ = 1.5mA (Typical)
•–55°C to +125°C Guaranteed
Temperature Range
•8-Pin 3mm x 3mm DFN and 12-Lead
MSOP Packages
Info & Free Samples
www.linear.com/product/LT4320
90
1-800-4-LINEAR
MOSFET FDMS86500
80
Temperature Rise (°C)
•Controls N-Channel MOSFETs
Diode SMB1040
70
60
50
40
30
20
10
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video.linear.com/136
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2
4
6
Current (A)
8
10
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